Drill head



May 6.1924.l

1,493,457 l J. T. WRIGHT DRILL HEAD y f Filed Aug. 24, 1922 2 Sheets-Sheet 1 @Kommata 1,493,457 J,..T. WRIGHT DRILL HEAD Fiied Aug. 24. 1922 2 sheets-sheer 2 III. I.\\\\\\\\\\\\.\\\\\\\\\\\\\-.. IIIIIIII..

May 6 1924.

'Patented May 6, 192,4.

JOSEPH T. WRIGHT, 0F INCINNATII'., OHIO, ASSIGNOR TO THE J'. T. WRIGHT COMPANY.,

02E' CINCINNATI, OHIO, A CORPORATION OF OHIO.

I 1,493,457 PATENT OFFICE.

DRILL HEAD.

Application mea Augen-24, 1922. seran No. 584,142.

To all lwhom t may concern.' y Be it known that I, JOSEPH T. WRIGHT, a citizen of the United States, and residing at Cincinnati, in the ,county of Hamilton ing unit or drill-head designed to be suit'- ably adjustably supported upon the machine frame, a plurality of such units or heads being usually employed' and rotatively adjusted upon the ,frame to 'posit-ion the cutting tools carried thereby in predetermined spaced relations for correspondingly boringor drilling the stock. The units are especially designed for use on paper drilling machines wherein a suitable number of the sameare adjustably mounted upon a stationary frame and relatively spaced for simultaneously drilling a plurality of spaced openings in the sheets, the paper being held upon a table movable to and away from the drilling or cutting tool,

An object of the invention is the provision of a drilling unit or drill head providing means thereon for slidably attaching and clamping the same to a support, and providing a rotatable drill spindle in said frame, Ysaid spindle translatable longitudinally of its axis.

Another object is the provision of means for micrometrically translating said spindle and locking the same in translated or adjusted osition.

Anot er object is the provision of means for locking a tool in the translatable spindle.

Another object is the provision of means for the verticaladjustment and non-rotative locking of a resser foot rod carried by the unit and designed to sustain a presser foot in fixed angular relation relative tothe cutting or drilling tool, and at thesame time allowing vertical movement of the" presser foot relative to the tool.

Another object lis to provide for a closer relative spacing oftpairs of drill spindles,

for boring correspondingly spaced openings in the stock, the object being furthered by' which when Eijk"properly placed together in pairs permit of more closely spaced disposition of the tools carried thereby.

Another object is the provision of means for disposing of the drillings from the cutting tools, and to provide for the non-'interferin angular. adjustmentthereof in conformity to the-'spacing of the drill units when combined in pairs for close tool spac-A ing. Y

lAnother objectis the provision of means accessiblejfrom the lfront of the drill-head or unit, for clamping the same to a rail.-v

Another object is the provision of meansv for preventing the deposit ofv oil on the spindle below the spindle bearings.

f Other objects and'certain advantages will be disclosed in a description of the drawings forming a part of this application, and in said drawings:

Figure 1 is a side elevation of my im-l proved tool-carrying or drilling unit, shown attached to a suitable support.

Figure 2 is a section 'on line 2 2, of Figurel, illustrating the manner of locking the tool within the translatable spindle.

Figure Bis a section on line 3 3, of Figure 1, showing the relation of the means'or disposing of the drillings of the tool and manner of. adjusting the same.

Fi ure 4 is a vertlcal v'sect-ion on line 4-4, of Flgure 1, illustrating a type of unit in which the spindle is oiset to the left of the 7 side of the device. l

Each drilling u nit comprises a framepor head 1 of substantiallyT rectangular skeleton configuration, upon which head are mounted,

all elements of the unitary structure, a-plurality of units being generallyemployed,

each slidably mounted upon a commonv su port and capable of being-clamped ina `]u}slted positions thereon, relative 'to one anot er.

Thesupport or rail 3 is mounted,

Asa

upon a suitable stationary frame, which may be a part of a machine, (not shown), and has upon its outer face a horizontal dovetail projection 4, against the lower and upper 'inclined faces of which are respectively engaged the inner face of a projection 6 of the frame 1 and one face of the clamp-block 7, the opposite face of said block engaging the corresponding face 8 of the frame. A bolt 9, having its head countersunk in the block 7, loosely traverses the frame horizontally and projects therefrom at its forward side, a suitable thumb nut 10 being engaged with the threaded end of the bolt. 1When the thumb-nut 10 is manipulated to clam the drill-head, the block 7 is drawn inwar ly toward the frame or head, the lower inclined face of the block 7 sliding' upwardly against the upper dove-tail surface, drawing the frame tightly against said dove-tail rojection. The thumb-nut 10 is dispose at the forward side of the frame where it is readily accessible.

The frame 1 provides openings 15, 16, as bearings for a rotatable longitudinally translatable drilling spindle 17, in this instance vertically disposed, said spindle having a head 18 providing a tool socket 19, and said socket communicating with an upwardly and youtwardly directed discharge passage 20, opening at the side of the head. The spindle above the head is counterturned as at 21 to provide a' shoulder 22 which is slightly spaced from the lower side of the 'frame' 1; The spindle is further counterturned as at '25 to provide a shoulder 26, this counterturned portion extending through the bearing opening 1,5 and into a housing 23 formed as an integral part of the frame at its top. A .bevelled gear 27 is disposed within the housing and is splined as at 28 to the upper end of the counterturned portion 25 of the spindle, the hub of the gear bearing upon the lower interior wall of the housing. Meshing with the gear 27 is a companion beveiled gear 3() splmed as at 31 to a drive shaft 32, which shaft rotatively traverses the walls of the housing and cover plate 33 therefor, said plate being clamp-ed to the housing by suitable screws.

Means for adjusting the spindle, to compensate for tool wear, forms an important feature of this invention, which adjustment is provided for in the following manner:

The frame 1 is open as at 35 for the receptionl of the splndle adjustingv means which consists of a thrust ball bearing 38 abutting theupper wall 39 of the opening 35 and engaged at its lower side by the shoulder 26 of the spindle, the counterturned portion 25 extending rotatively through the .element of the bearing. The up er end of the counterturned portion 21 is t readed as at 40 for engagement with the correspondjustment. The split collar 42 in turn rests vupon the upper washer of superposed washers 44, which washers are supported by the lower wall 45 of the opening 35. The lower edge of the adjusting collar 41 is` provided with a 4relatively right-angularly disposed diametrically related pair of spherical sockets 50 engageable bya spring pressed locking ball 51 pocketed in the split collar 42. 80 By rotating the collar 41 a longitudinal micrometric adjustment of the spindle may be obtained. The arrangement of thesockets 50 provides for the locking of the collar after each rotation through an arc of The units are made in rights and lefts to permit of a closer spacing between the cutting tools, so that, in some instances, pairs of relativel more closely spaced openings may be dril ed. As shown .1n Figure 6, right and left units are respectively designated a, b.

n order to make a closer spacing of the drills possible, the drill spindle is offset, in one instance, to the right ofthe center line .fn-4m passing through the transverse centerl of figure of a frame or head l, and in other frames, is offset to the left of such center line. Pairs of left and right units may be combined to -obtan closer spacing of the spindles, as best illustrated at the left end of Figure 6.

A novel feature of the invention resides in the manner of fastening or looking the tool or drill within the tool socket. The tool 55, as herein shown, is designed for cutting or drilling. paper, although any other form of tool may be `ased. 'The tool is of tubular formation providing a pasllo sage through which the cuttings are forced upwardly and delivered through a discharge passage 20, which assage is surrounded by an adjustable iousing having formed integrall therewith, a discharge spout. The shan of the tool 55 is grooved as at 56 for engagement with a pin 57 projecting laterally into ythe socket, which structure preventsl the turning of the drill. Midway of the shank of the drill is provided a circumferential locking groove 58. The spindle head 18 provides a groove 59 in the same plane, when the tool is seated, with the groove 58.` The'groove 59 is cir-l cularl machined and deepened at one .por- 12| tion tlirough asrnall arc of its circumference, to extend through the wall of the spindle head and to communicate with the groove 58, thus providing the circular depression 60, and opening 62 through the I8 spindle head. A spring locking clip 63 is engaged wit-hin the groove 59'and has an inwardly bowed terminal 'portion 64 engaged with the depression 60 conforming to the configuration thereof and extending through the opening 62 into the groove 58, locking the tool.

Adjacent to, overlapping the machined portion 60, and lying symmetrically across the groove 59, is a spherical depression 65 into and beyond which the terminal of the bowed portion 64 projects, enabling a finger grip to be obtained upon the cljip for springing the bowed portion outwar ly to release the clip from the groove 58 of the tool.

Means for disposing of the cuttings delivered through the tool and passage 20 is provided, which means has the form of the housing 70, surrounding spindle head and discharge passage 20, below the frame 1.

Integrally formed with the housing, and extending rearwardly and downwardly therefrom, is a spout 71, the end of which may be exibly connected with a suitable suction exhaust system, not shown.

As shown in Figure 4, a discharge passage 20 is disposed to deliver the cuttings at a point vwhere they will be readily drawn into the spout 71. The housing and spout are concentrically adjustable about the spindle to allow for on-interferingl positioning the same, when right and left units are combined as in Figure 6, in which Figure the spouts are shown, in dotted lines, in their properly adjusted position,-

a slight adjustment only being necessary.

Extending rearwardly from the upper end of the housing and disposed against the under surface of the frame, is an arm 75, provided with an arcuate slot 76 concentric with the axis of the spindle, through which slot extends the threaded screw 77 engaged with the frame 1. Proper angular adjustments are made by rotating the housing.

Attached at the front of the frame 1, and bridging the opening 35, is a bracket 8O providing varallel horizontal extensions having vertlcally aligned openings therein, within which openings is slidably disposed a spring depressible rod 81 having removabl and non-rotatably attached at its lower endY a forked presser foot 82 designed to engage the stock to prevent the slipping of the same when being drilled or bored. The presser foot is adjusted so that' the tool operates between the arms of the fork. As the drill travels through the stock u on the u ward movement of the table hot shown the presser foot is raised against the action of the spring 83 which is disposed about the rod 81, abuts the upper extension of the bracket at one end and its its other end abuts a rectangular block 85 slidably traversed by thev bar. This block has a rear plane surface slidably engaged against the vertical plane face of the bracket and is provided with a dog-point clamp screw 86, the point of which engages within a longitudinal groove 87 of the bar. By this means, the rotation of the bar and presser foot is prevented and both may be adjusted vertically to obtain the proper', presser foot tension, while the bar is left free to slide in its support.

In Figure 7 is shown a modification of the spindle translating and locking means in which additional provision is made for preventing the rotation of the adjusting collar 41, after being set in any predetermined manner. In this form of invention, a collar 90 is interposed between the adjusting collar 41 and the lower element of the bearing 38. .The collar 90 is nonrotatively held to the spindle by a set screw 91 engaging the groove 92. Thus a nonrotative element is disposed between two rotative elements to prevent mis-adjustment of the collar 41.

In order to prevent the leakage of oil, delivered to the spindle through the passages 94, 95, of the drill head or frame, a packing disk 96 surrounds the spindle and is socketed in the frame above the thrust bearing 38, and an additional washer 97 is socketed'in the lower face of the frame and held therein by an anuulus 98 surrounding the spindle, held clamped against the lower face of the frame and washer 97 by screws 99. The annulus 98 also acts as a means for rotatively centering the housing 70 about the spindle, thus performing a double function.

Having described my invention, I claim:

1. A machine tool, comprising a frame, means attached to said frame for adjustably attaching the same to a support` a spindle rotatively and translatably mounted in said frame, means for micrometrically translating said spindle. means for locking said micrometric translatingmeans, and means housed in said frame for rotating said s ndlc.

2. drilling unit, comprising a frame slidable upon a support, means carried by said frame for clamping the saine tov said support, a spindle journaled in said frame and translatable therein, gears for driving said spindle, said gears housed in said frame, a drive shaft in splined connection with one of said gears and slidably tra-versing said housing, and means for the micromet'ric longitudinal adjustmentv of said spindle, said means comprising an-annulus having threaded engagement with said 'spindle and having end sockets therein, a splitring splined to` said spindle abutting said annulus and having a spring-pressed ball therein en ageable with said sockets, and thrust-receiving elements respectively intersaid head, and means for locking said housing in adjusted position.

4. A frame, a spindle journaled in said frame. said spindle carrying a tool, a rod slidahly mounted upon said frame, a reotangular stop traversed by said rod for limiting the movement of the same, a com- Y pression spring surrounding said rod land abutting said stop and frame, a longitudinal groove in said rod, a screw traversing said stop and engaging said groove, one face of said rectangular stop engaging the. said frame to prevent rotation of said stop.

5. A tool lock, comprising a head having a socket therein, a circumferential groove in said head, said groove deepened at one portion and extended through said head and in communication with said socket., a depression in the face of said head overlappingr the plane of Said deepened portion of said groove, a spring clip in said groove having an arcuate portion conforming to the configuration of said groove and extending therebeyond for engagement with the groove of a tool inserted in said socket, the terminal of said arcuate portion of said clip projecting into and beyond said depression and deepened portion to provide a linger hold.

6. In combination with a head having a tool socket therein, of a tool Within said socket, said tool having a circumferential groove in its shank portion, of a circumferential groove in the face of said head, said groove circular-ly deepened at one` portion to communicate with said socket, a clip in said outer groove cngageable with said deepened portion and with said inner groove.

7. A drilling unit comprising a frame slidable upon a support, means carried by said frame for clamping the same to said support, a spindle journaled in said frame and translatable therein, gears for driving said spindle, said gears housed in said frame, a shaft slidable through one of sald gears and said housing for rotating said gear, and means for the micrometric longitudinal adjustment of said spindle, said means comprising an annulus havin threaded engagement with said spindle and having end sockets therein, a split ring having end sockets therein` a split ring Meats? splined to said spindle abutting said annu- ,lus and having a sprin pressed ball there- .on said head engaging one surface of said dove-tailed projection, a dove-tailed block engaging the other surface of said dovetailed projection, a bolt, socketed in said dove-tailed block, loosely traversin said frame, projecting therebeyond land tglareaded at its forward end, and a thumb-nut, engageable with said threaded end, accessible from the forward end of said frame.

9. A drill-head, a spindle 'ournaled in said frame and translatable t erein, gears for driving said spindle, said gears housed in said frame, a drive shaft in splined connection with one of said gears and slidably traversing saidv housing, and means for m1- crometrically translating said spindle, said means comprising an annulus having threaded engagement with said spindle and splined to said spindle abutting said annulus and having a spring-pressed ball therein engagingwith said sockets, a thrust receiving element interposed between said split ring and said frame, a sleeve abutting' said annulus, fastened to said shaft, and thrust receiving elements between i said sleeve and said frame.

10. A drill-head, a translatable spindle journaled therein, means for micrometriloo cally adjusting said spindle long'tudinall and means for locking said mierometric adjusting means, an oil groove, leading to saidl spindle above said adjusting means, an absorbent washer, socketed in said frame above said adjusting means, engagn said spindle, an oil groove below sai adjusting means communicating with said s indle, an absorbent washer socketed in said rame disposed about said spindle, a collar surround 110 ing said spindle and clamped against said washer, and a housing engaging said collar and rotatable thereabout.

In Witness whereof, I hereunto subscribe my name, as attested by the two subscribing '115 JOSEPH T. WRIGHT. Witnesses:

L. A. BECK, R. KIs'rNER.

witnesses. 

